Individual Steps of the Mizoroki—Heck Reaction and Intrinsic Reactivity of Intermediate Organopalladium Complexes Studied in the Gas Phase
作者:Lukas Fiebig、Joseph Held、Hans-Günther Schmalz、Mathias Schäfer
DOI:10.1255/ejms.1310
日期:2015.6
spectrometry and gas-phase ion/molecule reactions (IMRs) as well as by DFT computational analysis. The MHR was performed in the gas phase and the intrinsic reactivity of important intermediates was examined individually. Kinetics and substituent effects of cationic palladium-PCy3-aryl complexes (Cy = cyclohexyl) with 2,3-dimethylbutadiene in the MHR were analyzed via IMRs and CID. The kinetics and ion structures
Mizoroki-Heck 反应 (MHR) 的机理通过碰撞诱导解离 (CID) 串联质谱和气相离子/分子反应 (IMR) 以及 DFT 计算分析进行了分析。MHR 在气相中进行,并单独检查重要中间体的内在反应性。通过 IMR 和 CID 分析了 MHR 中带有 2,3-二甲基丁二烯的阳离子钯-PCy3-芳基复合物(Cy = 环己基)的动力学和取代基效应。研究了参与烯烃插入(即碳钯化)的物种的动力学和离子结构。此外,应用了线性自由能相关性,并推导出了通过四元过渡态进行的碳钯化步骤的协调机制,该机制仅表现出轻微的电荷分离。